diff --git a/src/stim/mem/bitword_128_sse.h b/src/stim/mem/bitword_128_sse.h
index a84e9875..3a585868 100644
--- a/src/stim/mem/bitword_128_sse.h
+++ b/src/stim/mem/bitword_128_sse.h
@@ -49,17 +49,17 @@ struct bitword<128> {
         _mm_free(ptr);
     }
 
-    inline bitword<128>() : val(__m128i{}) {
+    inline bitword() : val(__m128i{}) {
     }
-    inline bitword<128>(__m128i val) : val(val) {
+    inline bitword(__m128i val) : val(val) {
     }
-    inline bitword<128>(std::array<uint64_t, 2> val) : val{_mm_set_epi64x(val[1], val[0])} {
+    inline bitword(std::array<uint64_t, 2> val) : val{_mm_set_epi64x(val[1], val[0])} {
     }
-    inline bitword<128>(uint64_t val) : val{_mm_set_epi64x(0, val)} {
+    inline bitword(uint64_t val) : val{_mm_set_epi64x(0, val)} {
     }
-    inline bitword<128>(int64_t val) : val{_mm_set_epi64x(-(val < 0), val)} {
+    inline bitword(int64_t val) : val{_mm_set_epi64x(-(val < 0), val)} {
     }
-    inline bitword<128>(int val) : val{_mm_set_epi64x(-(val < 0), val)} {
+    inline bitword(int val) : val{_mm_set_epi64x(-(val < 0), val)} {
     }
 
     inline static bitword<128> tile8(uint8_t pattern) {
diff --git a/src/stim/mem/bitword_256_avx.h b/src/stim/mem/bitword_256_avx.h
index 4b5959f9..aac4964d 100644
--- a/src/stim/mem/bitword_256_avx.h
+++ b/src/stim/mem/bitword_256_avx.h
@@ -48,17 +48,17 @@ struct bitword<256> {
         _mm_free(ptr);
     }
 
-    inline bitword<256>() : val(__m256i{}) {
+    inline bitword() : val(__m256i{}) {
     }
-    inline bitword<256>(__m256i val) : val(val) {
+    inline bitword(__m256i val) : val(val) {
     }
-    inline bitword<256>(std::array<uint64_t, 4> val) : val{_mm256_set_epi64x(val[3], val[2], val[1], val[0])} {
+    inline bitword(std::array<uint64_t, 4> val) : val{_mm256_set_epi64x(val[3], val[2], val[1], val[0])} {
     }
-    inline bitword<256>(uint64_t val) : val{_mm256_set_epi64x(0, 0, 0, val)} {
+    inline bitword(uint64_t val) : val{_mm256_set_epi64x(0, 0, 0, val)} {
     }
-    inline bitword<256>(int64_t val) : val{_mm256_set_epi64x(-(val < 0), -(val < 0), -(val < 0), val)} {
+    inline bitword(int64_t val) : val{_mm256_set_epi64x(-(val < 0), -(val < 0), -(val < 0), val)} {
     }
-    inline bitword<256>(int val) : val{_mm256_set_epi64x(-(val < 0), -(val < 0), -(val < 0), val)} {
+    inline bitword(int val) : val{_mm256_set_epi64x(-(val < 0), -(val < 0), -(val < 0), val)} {
     }
 
     inline static bitword<256> tile8(uint8_t pattern) {
diff --git a/src/stim/mem/bitword_64.h b/src/stim/mem/bitword_64.h
index 4a4a16ec..3ffaf69b 100644
--- a/src/stim/mem/bitword_64.h
+++ b/src/stim/mem/bitword_64.h
@@ -45,15 +45,15 @@ struct bitword<64> {
         free(ptr);
     }
 
-    inline constexpr bitword<64>() : val{} {
+    inline constexpr bitword() : val{} {
     }
-    inline bitword<64>(std::array<uint64_t, 1> val) : val{val[0]} {
+    inline bitword(std::array<uint64_t, 1> val) : val{val[0]} {
     }
-    inline constexpr bitword<64>(uint64_t v) : val{v} {
+    inline constexpr bitword(uint64_t v) : val{v} {
     }
-    inline constexpr bitword<64>(int64_t v) : val{(uint64_t)v} {
+    inline constexpr bitword(int64_t v) : val{(uint64_t)v} {
     }
-    inline constexpr bitword<64>(int v) : val{(uint64_t)v} {
+    inline constexpr bitword(int v) : val{(uint64_t)v} {
     }
 
     constexpr inline static bitword<64> tile64(uint64_t pattern) {